77-400
For 77-400, specification type is neck_finish; description is 77 mm neck, 400 series (1 thread turn); primary dimension is T max 77.10 mm, T min 76.20 mm; secondary dimension is E max 74.70 mm, E min 73.81 mm; equivalence or compatibility note is 1 Thread turn, recorded from its source on 2026-08-12.
- Specification ID
- 77-400
- Specification type
- neck_finish our reading
- Description
- 77 mm neck, 400 series (1 thread turn)
- Primary dimension
- T max 77.10 mm, T min 76.20 mm
- Secondary dimension
- E max 74.70 mm, E min 73.81 mm
- Equivalence or compatibility note
- 1 Thread turn
- Additional data
- 400H max 12.75 mm, 400H min 12.00 mm; S max 1.90 mm, S min 1.14 mm; I min 64.70 mm; 6 threads/in.
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
77 | 77.10 | 76.20 | 74.70 | 73.81 | 12.75 | 12.00 | | | | | 1.90 | 1.14 | 64.70 | 6
— contapack.com.au, retrieved 2026-08-12
Source
- contapack.com.auhttps://www.contapack.com.au/SPI-Neck-Finishes.html